3v4l.org

run code in 500+ PHP versions simultaneously
<?php $arrTestVars = array( '0', '-0', '+0', '0.0', '0e0', '0.0e0' ); foreach($arrTestVars as $strTestVar) { var_dump( $strTestVar != 0 ); }
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.34, 8.3.0 - 8.3.35, 8.4.1 - 8.4.26, 8.5.0 - 8.5.11
bool(false) bool(false) bool(false) bool(false) bool(false) bool(false)
preferences:
28.79 ms | 1137 KiB | 7 Q